#!/bin/bash

set -v -x

mailtext=`mktemp -t faiXXX`
cat > $mailtext

log=`mktemp -t faiXXX`
date > $log

LAST_RUN_FILE="/var/run/fai_experimental_latest"

{

set -e

subject="`cat $mailtext | formail -X Subject: | sed 's/^Subject: //'`"
if ! echo $subject | egrep -q "^FAI:[[0-9]b~\.]+:[0-9]+$" ; then
  echo "Subject line $subject does not match pattern" 1>&2
  exit 1
fi
rev="`echo $subject | cut -f3 -d:`"
if [ -s $LAST_RUN_FILE ] ; then
  if [ "$(<LAST_RUN_FILE)" -ge $rev ] ; then
    echo "Already downloaded same or newer version $(<LAST_RUN_FILE)!" 1>&2
    exit 1
  fi
fi

cat $mailtext | formail -I "" | while read md5 pkg ; do
  wget "http://fai.alioth.debian.org/$pkg"
  our_sum="`md5sum $pkg | awk '{ print $1 }'`"
  if [ "$md5" != "$our_sum" ] ; then
    echo "md5sum of $pkg does not match!" 1>&2
    exit 1
  fi
done

echo "STATUS: download exit status 0"

} 2>&1 | tee $log

date >> $log

err_found=0
if ! grep -q "^STATUS: download exit status 0" $log ; then
  err_found=1
fi

if [ $err_found -eq 1 ] ; then
  mail -s "FAI download processing failed!" mt@debian.org < $log
else
  mail -s "FAI download processing successful" mt@debian.org < $log
fi

rm -f $log $mailtext